218149033 has 4 divisors (see below), whose sum is σ = 218471940. Its totient is φ = 217826128.

The previous prime is 218149031. The next prime is 218149037. The reversal of 218149033 is 330941812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163507369 + 54641664 = 12787^2 + 7392^2 .

It is a cyclic number.

It is not a de Polignac number, because 218149033 - 2¹ = 218149031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 218148986 and 218149004.

It is not an unprimeable number, because it can be changed into a prime (218149031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160438 + ... + 161791.

It is an arithmetic number, because the mean of its divisors is an integer number (54617985).

Almost surely, 2^218149033 is an apocalyptic number.

It is an amenable number.

218149033 is a deficient number, since it is larger than the sum of its proper divisors (322907).

218149033 is an equidigital number, since it uses as much as digits as its factorization.

218149033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322906.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 218149033 is about 14769.8690921755. The cubic root of 218149033 is about 601.9832824649.

The spelling of 218149033 in words is "two hundred eighteen million, one hundred forty-nine thousand, thirty-three".